August boll



(No Model.)

A. BOLL.

DEVICE FOR MAKING 'PLUMBERS TRAPS.

No. 384,956. Patented June 26, 1888.

Witnesses. frwentor WWW,

UNITED STATES PATENT Carlton.

TORREY, or

SAME PLACE.

DEVICE FOR MAKING PLUMBERS TRAPS.

SPECIPICATION forming part of Letters Patent No. 384,956, dated June 26, 1888.

Application filed Septemherfil, 1987. Serial No. 250.275. (No model.)

I0 all whom it may concern:

Be it known that I, AUGUST 130m, of the cityofBerlin,Prussia, Germany, have invented certain new and useful Improvements in Devices for Making Water Traps and Bends, of which I declare the following to be a specification.

This invention relates to improvements in devices for making water traps and bends from lead or other suitable metal or alloy.-

I am aware that a United States patent has been granted to Robert Cunningham, of Chi-- cago, Illinois, for improvements in devices for making water-traps, dated June 17,1873, No. 139,946, and my invention relates to a similar device, the object of which is to improve the device patented to the said Robert Cunningham; that the apparatus is fitted for practical use, which is not the case with the invention claimed, (shown and described in the Patent No. 139,946,) for the reason that Cunningham was either not able to move his diaphragm at all in consequence of the great pressure on the same, or the diaphragm very soon became defective, the surfaces of the same being subjected to so much wear and tear from one hard metal being in heavy frictional contact with the other that the invention really proved of no practical value whatsoever.

Now, in order to overcome all the obstacles presented by the invention of the said Robert Cunningham, I do not make my slide or diaphragm of one piece of hard metal for the reasons given above, and I have also found it equally impracticable to use softer metals, as the same are crushed or deformed by the great pressure exerted on the same by the lead or composition for forming the trap or bend. What I have found to be practicable and the only manner of rendering the invention of Cunningham useful is to make the body or main part of the slide or. diaphragm of hard durable metal-such as iron or steel--and" to sheath or cover the surfaces of the said slide or diaphragm or the surfaces of the slot in the die with a sheathing of softer or anti-friction metal-suchasphosphorusbronze,Deltametal, Ajax metal, or other suitable alloy-and to connect the slide or diaphragm with the mechanism of such power and strength that the slide or diaphragmcan be readily operated by hand,

Patent No. 139, 946.

Figure l is a side view of the die and the mechanism for moving the slide or diaphragm.

m :c. Fig. 3 is a plan or top View.

The die I), of steel, iron, or other hard metal. is fixed in the base plate a, securely attached to a suitable frame. The core or mandrel c is connected to the die 6 by means 'of the wings or projections d, said die being providedwith phragm e can move, said slide or diaphragm 6 consisting ofa strong plate of metal, preferably sheathed or clad with layers of anti-frielaterally-projectinglugs, which gear into slots in thecouncctingrailsg with so much play that the movement of the slide or diaphragm e is in no way impeded, said slide or diaphragm being prevented from making any lateral movement by the bolts or pegs h. The oppoas to fit the journals t, which are so turned that they stand eccentrically to the axis of the shaft is, which is carried in the bearings Z, the latter being rigidly attached to the baseplate a.

The shaft It carries in the central part of the same a lever, m, firmly keyed or otherwise at. tached to the same, the parts being held in position on the said shaft 70 and journals i by the able counter-nuts.

when straight tubes are to be produced.

If it is desired to make a trap or bend, the lever m is raised or depressed according to which side the bend is to run, whereby the tical mechanical contrivance.

Having now particularly described and as- Fig. 2 is a section through Fig. 8 on the line tion metal, and provided at its outer end withsite ends of the connecting-railsg are bored so verting an otherwise useless idea into a pracwhich was absolutely impossible according to a slot or opening in which the slide or dia-y strong washers and bolts or splints n or suit- The parts are rep resented in the drawings in the position they occupy certained the nature of my said invention and in what manner the same is to be performed, I desire it to be understood that what'I claim 1. In a device for making water traps and bends,rsheathing or covering the surfaces of the slide or diaphragm or die with an antifriction metal, substantially as described in the foregoing specification, and shown in the accompanying drawings.

2. In a device for making water traps and bends, the combination of the sheathed slide 6 with the connecting-rails g, shaft k, journals i, andrlever m, substantially as described in the foregoing specification, and shown in the accompanying drawings.

AUGUST BOLL.

Witnesses: or

FRANZ HENSEL, STANISLAUS Rossn. 

